The Return of Sherlock Holmes is a collection of Sherlock Holmes stories by Arthur Conan Doyle. Sherlock Holmes is a pop culture phenomenon, and he's one worth knowing about. After all, Holmes is one of the most popular, and most frequently cited, literary characters of all time. There's clearly something going on there that strikes people's interest.
But what's really interesting is that Holmes is one of those larger-than-life characters that everyone knows, but that few people really know all that much about. Sherlock Holmes has been interpreted and reinterpreted so many times, in movies, TV shows, and even just throwaway references, that it's hard to know exactly who this guy is. The Sherlock Holmes that exists in today's pop culture, and the Watson for that matter, are actually different in a lot of ways from the characters that exist in Sir Arthur Conan Doyle's stories. So, by actually reading Sherlock Holmes stories, you can really be in the know. It's good to go back to the original material and see what's up.